Rolling mill



Dec. 30, 1930. .1. B. TYTUS 1,785,793

ROLLING MILL iled May 20, 1925 2 Sheets-Sheet 1 AT TOR was Dec. 30, 1930.

J. B. TYTUS ROLLING HILL Filed Ila? 20, 1925 2 Sheets-Sheet 2 \NVEN TOR ATTORNEY5 Patented Dec. 30, 1930 UNITED STATES PATENT Omar.

JOHN B. TYTUS, OF MIDDLETOWN, OHIO, ASSIGNOIR TO THE AMERICAN ROLLING MILL COMPANY, OF MIDDLETOWN, OHIO, A CORPORATION OF OHIO ROLLING MILL Application filed May 20,

My invention relates to rolling mills, more particularly where employed to roll sheets in successive stands of rolls.

There are many problems involved in the 5 reduction of metal in the finer gauges, when of the Width of sheets, in which the length is necessarily short, and hence no pulling action on the piece can actas a guide for its movement through successive stands of rolls, and in which the width is such that the fit of the piece to the rolls is hard to establish and in which defective fit of the piece to the rolls, will result in twisting at the edges or dishing down the middle. In thick metal at proper is temperature and hence softness,'the-piececan take the shape of the bite between the rolls, but in thinner metal there is not enough metal vto flow ahead of the drawing action of the rolls, and hence some one or more zones of the piece will he reduced in passing through a stand of rolls more than other zones, with the result of a cobble.

For the above reasons and others which it will not be necessary to mention, it is not 2 believed tobe practical to pass a piece through aqnumber'of stands of rolls, which work it to fine gauge, without giving an operator an opportunity to observe and manipulate the piece intermediate the stands .30 and. without maintaining the temperature of the piece suificiently, that a predetermined roll setting shape and temperature can be counted on to efiect the desired reduction and present the same shape of bite to the piece. In the rolling mills of the present day, it is common practice to provide in the sheet mill for a series of roughing and finishing stands of rolls, strung along a single large power shaft, which is held steady by a fly wheel of tremendous size and weight. It is my object to utilize such an arrangement of rolls arranged alon a single drive shaft, or like arrangement 0 stands of rolls placed end for end, and to provide a transfor device for moving the pieces from stand to stand. Also it is my object" to provide reheatin furnaces to be arranged in connection with the transferringdevices. It is still another object to so arrange the transferring "s device that the several stands of rolls can be 1925. Serial N0. 31,609.

served by operators with ample opportunity to observe and manipulate the pieces, particularly to open up the packs to straighten them up and feed them properly to the rolls.

It is my general object to provide an ac- 'so as to give to each stand, pieces of an equal heat and hence softness. 1

I accomplish my objects by that certain construction and arrangement of parts to be hereinafter more particularly pointed out and claimed, In the drawings: Figure 1 is a partially diagrammatic plan View of myaclevice.

Figure 2 is a side elevation partially diagrammatic.

Figure 3 is a sectional View along the lines 33 in Figure 1.

Figure 4 is a sectional View along the lines H of Figure 1.

I have shown three stands of rolls, and it. should be understood that as many stands,

similarly arranged, can be used, as is found desirable.

I show the main shaft 1, which will be driven by suitable means for energizing the stands of rolls. In the first stand the housings are shown at 2, 2, and the lower roll 2a is mounted directly on the shaft. The upper roll 26 on this stand is adjusted in position by means of the usual screws (not shown).

In order to alternately drive the successive standsin opposite directions only the odd. numbered stands (in the drawing the first and third stand) are driven direct from the main shaft 1. The even numbered stands as the second stand in the drawing are offset. The housings 33 of the second stand are placed on one side of the shaft 1 and reversing gear journal boxes furnish a very positive drive for the even numbered stands. As diagrammatically illustrated in the drawings on each side of the second stand are the housings 4 for the reversing gears 4a, 4a, which are on the same shaft as the lower roll 3a. Mounted on the shaft 1 and housed in the standards in cooperating position, the driving gears 5-5 are disposed, in engaging posit1on. The upper roll 3?) of the second stand is like the upper roll of the first stand.

The third stand with housings 6, lower rollbered stands being driven in the opposite di-' rection from the odd numbered stands, and to utilize the easiest possible modification in structure of what will be found in present day sheet mills which may be altered according to my invention.

. wo sets of reversing gear housing assemblies and moving the roll housings to one side of the main shaft will be the only modification and equipment required to adapt the usual sheet mill equipment for use in accordance with my invention.

The transferring device is formed in alternating left and right units, each unit taking off from one stand and delivering to the next. One practical form will be a series of interspaced bars 7, making a supporting bed of a width exceeding the length of the pieces to be handled.

Mounted on shafts 8, beneath the table, are eccentrics 9, whichare rotated by the shafts, there being several on each shaft. On the eccentrics are large straps 10, connected by articulated, rigid links 11, and having bars 12 extending upwardly. The bars 12 are pivotally connected to the lifting bars 13.

There may be, for example, four eccentrics and straps on each shaft, arranged to carry four lifting bars.

In such a' construction which is like the feeding device in a plate glass lehr, the lifting bars will be arranged to pick up the sheets and move them by stages from one stand of rolls to the next. There is nothing of essential novelty in this mechanical transferring device and detailed showing seems unnecessary.

Where the sheets are fed out from the rolls, standards 16 will be provided, which support rollers 14, the rollers having axes parallel to the axes of the mill rolls. Also stops 15 may be provided to prevent over-riding by the piece, as it emerges from the several stands.

. Arranged between the stands are furnaces 18 having floors 17, through which the lifting bars may pass and on which the bars 7 may rest. Where it is not desired to have a furnace between any two stands the table bars 7 andlifting bars. 13 may be shortened and weaves the stands of rolls brought closer to each other.

In the diagram, which will show sufficient for those skilled in the art to fully comprehend and practice my invention, I have shown the lifting bar device and furnace so arranged that as the pack emerges from the first stand, for example, it is picked up by the lifting bars and moved by stages into the furnace, where the temperature will be such as to reheat the piece.

The forward movement imparted to the pack emerging from the rolls by the arms 13 is enough to clear a space on the bars 7 before the next sheet is moved onto the bars 7 so that the sheets pass through the furnace in interspaced position. Thus in the diagram in Figure 2, the sheet shown at A will be moved by a single revolution of the eccentric to the position B which will leave an open space on the bars 7 for the next succeeding sheet. Thus there is no tendency for the sheets to over-ride one another.

Many features of the mechanical structure of my invention are merely preferred structures and changes in the disposition of the parts will readily occur to those skilled in this art. It will be equally practical to offset the even numbered stands by raising them off the floor sufficiently to permit .the main shaft to pass underneath them, though I prefer the arrangement as herewith shown.

The devices will operate to accomplish the objects designated with the result of successive reduction of the piece and the possibility due to the standardization of temperature, of using fairly predetermined roll settings.

It is readily possiblefor a single crew in charge of an experienced head roller, to do eight times more and upward in a turn, than following the practices of the present da in sheet manufacture and in the jobbing mil Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In combination in a sheet mill a series of stands of plain faced rolls forsuccessive reduction of hot metal, arranged end to end, and driven alternately in opposite directions, and a transfer device arranged to move the piece sidewise from one stand to the next, and

-a furnace surrounding said transfer device between two of the stands at least.

2. In combination in a sheet mill a series of stands of plain faced rolls for successive reduction of hot metal, arranged end to end, and driven alternately in opposite directions, and

a transfer device comprising a table extend-- ing between at least one'oppositel -pairof stands, a furnace surroun ing said driven 3. In combination in a. sheet mill 8. series of stands'ofr qlls for successive reduction of hot metal arrainged end to'end, and driven alternately in opposite directions, and a transfer device comprising a table extending being formed of interspaced bars.

I 4. In combination in a sheet mill a series of stands of rolls for reducing hot metal, ar-

ranged end for end and alternately driven in opposite directions and tables alternating from the back of each stand to the front of the next, and means formoving the pieces sidewisealong the tables, and furnaces surrounding that portion of selected tables which does not lie in front of a stand of rolls.

JOHN B. TYTUS. 

